| Glass Components UK Limited | Wholesale & retail | 2021 |
| Glass Merchants Ltd | Other services | 2024 |
| Global 17 Ltd | Professional & scientific | 2022 |
| Gnhc Sports Ltd | Arts & recreation | 2026 |
| GO2 Holdings Limited | Financial services | 2015 |
| Gobowen Chippy Limited | Hospitality | 2021 |
| Gocl Holdco Limited | Financial services | 2024 |
| Gocl Propco Limited | Financial services | 2024 |
| Golden Prosperity Printing Ltd | Wholesale & retail | 2019 |
| Goldhill International Consulting Limited | Professional & scientific | 2017 |
| Gone Home Ltd | Construction | 2015 |
| Gone Racing Ltd | Arts & recreation | 2010 |
| Gracie Beazley Ltd | Administrative & support | 2010 |
| Gracie Limited | Information & communication | 2023 |
| Grange Developers Ltd | Extraterritorial | 2023 |
| Great Linford Fastfood Ltd | Hospitality | 2015 |
| Greatworth Property Managers Limited | Real estate | 2008 |
| Green Bike Pool Ltd | Arts & recreation | 2018 |
| Green Commute Initiative Ltd | Administrative & support | 2016 |
| Green Energy Installations (UK) Limited | Other services | 2011 |
| Green Lane Designs Limited | Professional & scientific | 2007 |
| Green Lane Group Limited | Financial services | 2008 |
| Green Machine Computers Ltd | Wholesale & retail | 2011 |
| Green Stay Services Ltd | Administrative & support | 2024 |
| Greencycle Recycling Limited | Water & waste | 2023 |
| Greenfish Construction Ltd | Construction | 2025 |
| Greenwell Services Limited | Information & communication | 2024 |
| Gresham Contracts Limited | Construction | 1986 |
| Grilled Grub Ltd | Hospitality | 2019 |
| Grove Interiors (London) Ltd | Professional & scientific | 2012 |
| Grove Laundrette Ltd | Administrative & support | 2019 |
| Grqrem Holdings Limited | Financial services | 2024 |
| Gsbmk Consultancy Limited | Real estate | 2023 |
| Gsbmk Holdings Limited | Real estate | 2023 |
| GW Home and Sealants Ltd | Construction | 2022 |
| H E Rose Consulting Ltd | Information & communication | 2022 |
| Hamblin Meadow Amenity Land Limited | Real estate | 1997 |
| Hamilton Associates Ltd | Extraterritorial | 2011 |
| Hampshire Threads Ltd | Manufacturing | 2023 |
| Hanns Technologies Ltd | Manufacturing | 2025 |
| Harmoore Limited | Real estate | 2016 |
| Harpers Garage Ltd | Wholesale & retail | 2017 |
| Harpers Management Limited | Real estate | 2025 |
| Hart & Co Refrigeration and Air Conditioning Limited | Construction | 2011 |
| Hartland Investments Limited | Real estate | 2017 |
| Hawthorn Advisory Limited | Professional & scientific | 2019 |
| Hayden Home Improvements Ltd | Construction | 2021 |
| Haynead Development Limited | Construction | 2020 |
| Health Research Services Ltd | Administrative & support | 2000 |
| Heath Kitchens Ltd | Manufacturing | 2023 |
| Heavenly Finances Limited | Professional & scientific | 2011 |
| Hedge Estate Contracting Limited | Agriculture & fishing | 2016 |
| Heidi Alpe & Associates Ltd | Information & communication | 2024 |
| Heidi Brown Ltd | Health & social care | 2012 |
| Helius Investments Limited | Real estate | 1963 |
| Helmsdale Investments Limited | Real estate | 1964 |
| Henry's Tea Room Limited | Hospitality | 2024 |
| Hentrix Limited | Real estate | 2024 |
| Hepburn Ventures Limited | Professional & scientific | 2022 |
| Hettie's Dog Parks Ltd | Real estate | 2025 |
| Hexxie Limited | Information & communication | 2023 |
| Hidecote Properties Limited | Real estate | 2011 |
| High View Racing Limited | Arts & recreation | 2012 |
| Hillside Stud Ltd | Extraterritorial | 2017 |
| Hive Landscapes Limited | Administrative & support | 2024 |
| HJC Davies Limited | Construction | 2023 |
| HJC Holdings Limited | Real estate | 2025 |
| Holistic Business Consultants Ltd | Professional & scientific | 2000 |
| Hook Estates Ltd | Administrative & support | 2014 |
| Hook Holdings Limited | Administrative & support | 2016 |
| Hopskotch Ltd | Wholesale & retail | 2011 |
| Hot Cake Holdings Ltd | Wholesale & retail | 2022 |
| House 1883 Ltd | Wholesale & retail | 2026 |
| House of Benney Limited | Wholesale & retail | 2018 |
| House of Loulou Ltd | Wholesale & retail | 2024 |
| Howard House Hotels Ltd | Hospitality | 2020 |
| HR Biscuit Ltd | Information & communication | 2019 |
| HTP Consulting Limited | Transport & logistics | 2001 |
| Human Resources & Fleet Management Consultancy Ltd | Administrative & support | 2003 |
| Hungerford Bookcase Co. Ltd | Manufacturing | 2023 |
| Hungerford Design Limited | Professional & scientific | 2004 |
| Hungerford Emporium Ltd | Real estate | 2025 |
| Hungerford Estates Limited | Real estate | 2011 |
| Hungerford Investments LLP | | 2001 |
| Hungerford Kebab Ltd | Hospitality | 2021 |
| Hungerford Management Limited | Real estate | 2008 |
| Hungerford Park Consultancy Limited | Construction | 2016 |
| Hungerford Park Homes Limited | Real estate | 2024 |
| Hungerford Park Limited | Agriculture & fishing | 1995 |
| Hungerford Property Developments Limited | Construction | 1994 |
| Hungerford Service Centre Limited | Wholesale & retail | 2011 |
| Hyperion C-Ied Limited | Extraterritorial | 2023 |
| Hypertec Limited | Manufacturing | 1996 |
| Hywood House Limited | Real estate | 2017 |
| I Want 1 Also Limited | Professional & scientific | 2025 |
| I Want 1 TOO Limited | Professional & scientific | 2022 |
| I3WEB Limited | Professional & scientific | 2012 |
| IAN Coley Sporting Limited | Wholesale & retail | 2012 |
| Ice Cold Tools Ltd | Wholesale & retail | 2022 |
| IH Courses Limited | Arts & recreation | 2014 |